2191724326134 has 320 divisors, whose sum is σ = 5855057252352. Its totient is φ = 599622912000.

The previous prime is 2191724326123. The next prime is 2191724326139. The reversal of 2191724326134 is 4316234271912.

2191724326134 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 7 + 24 + 3 + 2 + 613 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2191724326134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191724326139) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2085369909 + ... + 2085370959.

Almost surely, 2^{2191724326134} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191724326134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2927528626176).

2191724326134 is an abundant number, since it is smaller than the sum of its proper divisors (3663332926218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191724326134 is a wasteful number, since it uses less digits than its factorization.

2191724326134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1664 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The spelling of 2191724326134 in words is "two trillion, one hundred ninety-one billion, seven hundred twenty-four million, three hundred twenty-six thousand, one hundred thirty-four".